JP2639531B2 - Transmission line snow accretion prevention device - Google Patents

Transmission line snow accretion prevention device

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Publication number
JP2639531B2
JP2639531B2 JP62206848A JP20684887A JP2639531B2 JP 2639531 B2 JP2639531 B2 JP 2639531B2 JP 62206848 A JP62206848 A JP 62206848A JP 20684887 A JP20684887 A JP 20684887A JP 2639531 B2 JP2639531 B2 JP 2639531B2
Authority
JP
Japan
Prior art keywords
electric wire
snow
inner cylinder
temperature
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP62206848A
Other languages
Japanese (ja)
Other versions
JPS6450710A (en
Inventor
武雄 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HATSUKO DENKI KK
Original Assignee
HATSUKO DENKI KK
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Filing date
Publication date
Application filed by HATSUKO DENKI KK filed Critical HATSUKO DENKI KK
Priority to JP62206848A priority Critical patent/JP2639531B2/en
Publication of JPS6450710A publication Critical patent/JPS6450710A/en
Application granted granted Critical
Publication of JP2639531B2 publication Critical patent/JP2639531B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 産業上の利用分野 この発明は、送電線に対する着雪を防止し、電線のギ
ャロッピングによる一線地絡事故や相間短絡事故、断線
事故等を防止するための送電線用着雪防止装置に関す
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission line for preventing snow accretion on a power transmission line, and preventing a single-line ground fault, an interphase short-circuit accident, a disconnection accident, and the like due to galloping of the power line. It relates to a snow prevention device.

従来技術 日本海側の諸地方のように湿雪が大量に降る豪雪地帯
においては、着雪による送電線の一線地絡事故、相間短
絡事故、断線事故等が少なくない。2. Description of the Related Art In heavy snowfall areas where a large amount of wet snow falls, as in various regions on the Sea of Japan side, there are not a small number of single-line ground faults, interphase short-circuit accidents, and disconnection accidents caused by snow accretion.

一般に、電線に対する着雪は、電線の上部に積もった
雪が自重によって半回転して下方に移動し、その上にさ
らに雪が降り積もることを繰り返して成長することが知
られている。また、この現象は、湿度が高く、風が弱い
ときに多量の降雪があると顕著にみられ、着雪の厚さ
は、数10mm〜数100mmにも達するため、その重みで電線
が切断され、また、径間における着雪が一度に剥落する
と電線の跳躍が起こり（いわゆるギャロッピング現
象）、一線地絡や相間短絡を引き起こす原因となる。In general, it is known that snow accumulates on an electric wire by repeatedly repeating that snow accumulated on an upper portion of the electric wire moves downward by a half turn due to its own weight, and further snow falls on the electric wire. Also, this phenomenon is remarkable when there is a lot of snowfall when the humidity is high and the wind is weak, and the thickness of the snowfall reaches several tens mm to several hundred mm, so the wire is cut by the weight In addition, if snow accumulates in spans at once, the wires jump (so-called galloping phenomena), causing a single-line ground fault or a short circuit between phases.

そこで、かかる着雪現象や、着雪の成長を許容限度内
に留めるための従来技術として、いわゆる着雪防止リン
グが知られている。このものは、径間内の電線の全長を
所定の長さ以下に区分するように、電線上の所定間隔ご
とに取り付けて円板上の部材であって、電線長が短く区
分されて着雪も分断されるため、着雪が回転するときに
電線から剥離し易くなり、したがって、一定限度以上の
着節の成長を有効に阻止することができる。Therefore, a so-called snow prevention ring is known as a conventional technique for keeping the snow accumulation phenomenon and snow growth within allowable limits. This is a member on a disk attached at predetermined intervals on the electric wire so that the entire length of the electric wire in the span is divided into a predetermined length or less. Also, the snow is easily separated from the electric wire when the snow rotates, and therefore, the growth of the nodule beyond a certain limit can be effectively prevented.

発明が解決しようとする問題点 かかる従来技術によるときは、電線上の着雪は、単に
着雪防止リングによって機械的に分断されているのみで
あるから、気温で低いと、着雪防止リングと着雪との間
に凍結が生じるために着雪の分断効果が不完全となっ
り、着雪の成長の阻止効果が不十分であることが少なく
ないという問題があった。Problems According to the Related Art According to the related art, the snow on the electric wire is merely mechanically separated by the snow prevention ring. There is a problem that the effect of dividing snow accretion becomes incomplete because freezing occurs during snow accretion, and that the effect of inhibiting the growth of snow accretion is often insufficient.

そこで、この発明の目的は、かかる従来技数の問題に
鑑み、電線の周方向に磁気回路を周方向に磁気回路を形
成する開閉形の外筒を設けることによって、外筒の発熱
を利用して電線上の着雪を確実に分断し、着雪の成長を
確実に阻止することができる送電線用着雪防止装置を提
供することにある。Accordingly, an object of the present invention is to take advantage of the heat generated by the outer cylinder by providing an open / close outer cylinder that forms a magnetic circuit in the circumferential direction of the electric wire in the circumferential direction of the electric wire in view of the problem of the conventional technique. It is an object of the present invention to provide a snow-prevention device for a power transmission line, which can surely cut off snow accretion on electric wires and reliably prevent the growth of snow accretion.

問題点を解決するための手段 かかる目的を達成するためのこの発明の構成は、電線
の外周に固定する内筒と、強磁性材料からなり、内筒の
外周に装着する外筒とを備え、外筒は、内筒に固定する
固定部と、温度検出部材を介して固定部に開閉自在に連
結する可動部とに分割し、温度検出部材は、着雪が生じ
得る気温に作動温度を設定し、低温時において可動部を
閉じ、固定部とともに電線の周方向に磁気回路を形成さ
せる一方、高温時において可動部を開き、磁気回路を遮
断することをその要旨とする。Means for solving the problems The configuration of the present invention for achieving such an object includes an inner cylinder fixed to the outer periphery of the electric wire, and an outer cylinder made of a ferromagnetic material and attached to the outer periphery of the inner cylinder, The outer cylinder is divided into a fixed part that is fixed to the inner cylinder and a movable part that is openably and closably connected to the fixed part via a temperature detection member, and the temperature detection member sets the operating temperature to an air temperature at which snow can occur. The gist of the present invention is to close the movable part at a low temperature and form a magnetic circuit in the circumferential direction of the electric wire together with the fixed part, and open the movable part at a high temperature to cut off the magnetic circuit.

作 用 かかる発明の構成によるときは、可動部は、温度検出
部材を介し、電線上に着雪発生するような低温時におい
て閉じ、電線の周方向に磁気回路を形成するので、送電
電流による交番磁束が磁気回路内に集束されることによ
って外筒に誘導電流が発生し、外筒が発熱する。そこ
で、外筒は、径間内の電線上の着雪を確実に分断するこ
とができる。According to the configuration of the present invention, the movable portion closes at a low temperature at which snow occurs on the electric wire via the temperature detecting member and forms a magnetic circuit in the circumferential direction of the electric wire. When the magnetic flux is focused in the magnetic circuit, an induced current is generated in the outer cylinder, and the outer cylinder generates heat. Therefore, the outer cylinder can surely cut off snow accumulation on the electric wires in the span.

一方、可動部は、高温時において開き、磁気回路を遮
断するから、外筒の不用な発熱熱を防止することがで
き、内筒を含む各部材の耐久性を高めるとともに、送電
損失を最小に抑えることができる。なお、内筒は、電線
の外筒に固定することができ、外筒は、内筒に固定する
固定部を介して内筒に装着する。すなわち、外筒は、可
動部の開閉に拘らず、内筒を介して電線の所定位置に安
定な固定することができる。On the other hand, since the movable portion opens at high temperatures and shuts off the magnetic circuit, unnecessary heat generation of the outer cylinder can be prevented, and the durability of each member including the inner cylinder is increased, and power transmission loss is minimized. Can be suppressed. In addition, the inner cylinder can be fixed to the outer cylinder of the electric wire, and the outer cylinder is attached to the inner cylinder via a fixing portion for fixing to the inner cylinder. That is, the outer cylinder can be stably fixed at a predetermined position of the electric wire via the inner cylinder regardless of whether the movable portion is opened or closed.

実施例 以下、図面を以って実施例を説明する。Embodiments Hereinafter, embodiments will be described with reference to the drawings.

送電線用着雪防止装置Ｋは、内筒10と外筒20とを同心
円状に組み立ててなる（第１図、第２図）。The transmission line snow accretion prevention device K is constructed by assembling the inner cylinder 10 and the outer cylinder 20 concentrically (FIGS. 1 and 2).

内筒10は、電線Ｌの外周を把持することができるよう
に、内側からの深い切込み11を有する二つ割り構造の筒
状体である。内筒10は、たとえば合成樹脂のような非磁
性材料からなり、切込み11の両側の樋状部12、12は、切
込み11の残部11aを介して左右に開閉自在である。ま
た、内筒10は、電線Ｌを左右から把持し、止めねじ13を
介して重合部12a、12aをねじ止めすることにより、電線
Ｌ上の任意の位置に固定することができる。ただし、止
めねじ13は、内筒10の長手方向に適宜の数を使用するも
のとする。The inner cylinder 10 is a cylindrical body having a split structure having a deep cut 11 from the inside so that the outer periphery of the electric wire L can be gripped. The inner cylinder 10 is made of a non-magnetic material such as a synthetic resin, for example, and the gutter-like portions 12 on both sides of the cut 11 can be opened and closed left and right through the remaining portion 11a of the cut 11. Further, the inner tube 10 can be fixed at an arbitrary position on the electric wire L by gripping the electric wire L from the left and right and screwing the overlapping portions 12a, 12a via set screws 13. However, an appropriate number of setscrews 13 are used in the longitudinal direction of the inner cylinder 10.

外筒20は、樋状に形成する固定部21、可動部22から構
成されている。可動部22は、固定部21に対し、バイメタ
ル23を介して開閉自在に連結されており、外筒20は、全
体として筒状体に形成されている。固定部21、可動部22
は、鉄のような強磁性材料から形成し、それぞれの内側
の曲率半径は、内筒10の外形に適合している。The outer cylinder 20 includes a fixed part 21 and a movable part 22 formed in a gutter shape. The movable part 22 is connected to the fixed part 21 via a bimetal 23 so as to be openable and closable, and the outer cylinder 20 is formed as a cylindrical body as a whole. Fixed part 21, movable part 22
Are formed from a ferromagnetic material such as iron, and the inner radius of curvature is adapted to the outer shape of the inner cylinder 10.

固定部21は、止めねじ21a、21a…を介し、内筒10の外
周に密着するようにして固定されている。また、可動部
22は、外筒20の母線方向に長いバイメタル23と、止めね
23a、23a…とを介し、固定部21と一体に連結されてい
る。外筒20は、周囲温度の高低によりバイメタル23が変
形することによって、内筒10の外周に密着する完全な円
筒状となり（第１図、第２図の実線）、また、固定部2
1、可動部22の重合部21b、22aが完全に分離して外側に
開くことができる。（同図の二点鎖線）。ただし、パイ
メタル23は、低温時において可動部22を閉じ、高温時に
おいて可動部22を開くように作動し、その作動温度は、
着雪が生じ得る気温、たとえば約５℃程度以上を高温と
みなし、それ以下を低温とみなすように設定するものと
する。The fixing portion 21 is fixed so as to be in close contact with the outer periphery of the inner cylinder 10 via set screws 21a, 21a. Also, movable parts
22 is a bimetal 23 that is long in the generatrix direction of the outer cylinder 20 and
23a, 23a... Are integrally connected to the fixed portion 21. When the bimetal 23 is deformed due to the level of the ambient temperature, the outer cylinder 20 becomes a completely cylindrical shape that is in close contact with the outer periphery of the inner cylinder 10 (solid lines in FIGS. 1 and 2).
1. The overlapping portions 21b and 22a of the movable portion 22 can be completely separated and opened outward. (Two-dot chain line in the figure). However, the pie metal 23 operates so as to close the movable part 22 at a low temperature and open the movable part 22 at a high temperature.
It is assumed that a temperature at which snow accumulates, for example, about 5 ° C. or higher, is regarded as a high temperature, and a temperature below the temperature is regarded as a low temperature.

かかる構成の送電線用着雪防止装置地Ｋは、送電鉄塔
Ｔ、Ｔ間の径間ｄにおいて、適宜の間隔をおいて電線Ｌ
上に装着して使用する（第３図）。すなわち、内筒10
は、樋状部12、12を左右に開き、電線Ｌを把持するよう
にして閉じた後、止めねじ13、13…によって電線Ｌ上に
固定することができ、外筒20は、このようにして固定し
た内筒10、外筒20の重合部12a、12a、21b、22aは、電線
Ｌの下側に位置させることが好ましく、これによって、
外筒20の可動部22が開いても、可動部22と内筒10との間
に塵埃等が堆積することがない。The transmission line snow accretion prevention ground K having such a configuration is provided with an electric wire L at an appropriate interval in the span d between the power transmission towers T.
Mount on top and use (Fig. 3). That is, the inner cylinder 10
Can be fixed on the electric wire L by set screws 13, 13 ... after the gutter-shaped portions 12, 12 are opened to the left and right and closed so as to grip the electric wire L. The overlapped portions 12a, 12a, 21b, 22a of the inner cylinder 10 and the outer cylinder 20 fixed by being fixed are preferably located below the electric wire L.
Even when the movable part 22 of the outer cylinder 20 is opened, dust and the like do not accumulate between the movable part 22 and the inner cylinder 10.

バイメタル23は、電線Ｌ上に着雪が発生する程の低温
気象時において、外筒付20の可動部22を内筒10の外周に
密着させるように閉じ、外筒20は、可動部22と固定部21
とが重合部22a、21bを介して密着して、電線Ｌの周方向
に筒状の磁気回路を形成する。そこで、電線Ｌに流れる
送電電流によって発生する交番磁束が磁気回路中に集束
され、外筒20の内部に大きな誘導電流が発生する結果、
外筒20が発熱する。すなわち、電線Ｌ上に成長する着雪
は、外筒20の発熱のために、送電線用着雪防止装置Ｋの
装着間隔ごとに分断され、電線Ｌの全長に亘って一体に
成長するときに比して、その最大着雪厚さを大幅に抑制
することができる。The bimetal 23 is closed so that the movable part 22 of the outer cylinder 20 is brought into close contact with the outer periphery of the inner cylinder 10 in a low-temperature weather condition in which snow occurs on the electric wire L, and the outer cylinder 20 is fixed to the movable part 22. Part 21
Are in close contact with each other via the overlapping portions 22a and 21b to form a cylindrical magnetic circuit in the circumferential direction of the electric wire L. Therefore, the alternating magnetic flux generated by the transmission current flowing through the electric wire L is focused in the magnetic circuit, and a large induced current is generated inside the outer cylinder 20.
The outer cylinder 20 generates heat. That is, the snow accumulation that grows on the electric wire L is divided at every mounting interval of the transmission line snow accumulation preventing device K due to the heat generation of the outer cylinder 20, and when the snow grows integrally over the entire length of the electric wire L. In comparison, the maximum snow thickness can be significantly reduced.

一方、バイメタル23は、電線Ｌ上に着雪が発生するお
それのない高温気象時において可動部22を外方に開くよ
うに変形し、これによって、外筒20は、その磁気回路を
遮断する。すなわち、このときの外筒20は、殆ど発熱す
ることがない。On the other hand, the bimetal 23 is deformed so as to open the movable portion 22 outward in high-temperature weather when there is no possibility of snow accretion on the electric wire L, whereby the outer cylinder 20 interrupts its magnetic circuit. That is, the outer cylinder 20 at this time hardly generates heat.

なお、内筒10、外筒20の全長は、外筒20における発熱
量が十分に大きく、最も厳しい気象条件においても外筒
20の外周温度が所定値以上となるように、適宜設定すれ
ばよい。Note that the total length of the inner cylinder 10 and the outer cylinder 20 is large enough that the calorific value of the outer cylinder 20 is large,
What is necessary is just to set suitably so that the outer peripheral temperature of 20 may become more than a predetermined value.

他の実施例 内筒10は、全体が電線Ｌに沿って移動することがない
ように、全体を電線Ｌに対して固定する。そこで、内筒
10は、止めねじ13、13…による他、任意の固定方法を採
用することができる。たとえば、内筒10は、互いに係合
する係合突部と係合凹部とを樋状部12、12の重合部12
a、12aに形成し、樋状部12、12を閉じることにより、一
挙動で装着を完了することができる。Other Embodiments The entire inner cylinder 10 is fixed to the electric wire L so that the entire inner cylinder 10 does not move along the electric wire L. So, the inner cylinder
10, any fixing method other than the set screws 13, 13,... Can be adopted. For example, the inner cylinder 10 has an engagement projection and an engagement recess that engage with each other,
a, 12a, and closing the gutter-like portions 12, 12, the mounting can be completed in one action.

また、バイメタル23は、周囲温度に感応し、所定の作
動温度において固定部21に対して可動部22を開閉させる
温度検出部材である。よって、バイメタル23は、かかる
機能を実現することができる限り、たとえば形状記憶合
金のような他の素材に代えてもよい。The bimetal 23 is a temperature detecting member that responds to the ambient temperature and opens and closes the movable portion 22 with respect to the fixed portion 21 at a predetermined operating temperature. Therefore, the bimetal 23 may be replaced with another material such as a shape memory alloy as long as such a function can be realized.

さらに、固定部21、可動部22は、双方が密着するとき
に電線Ｌの周方向に磁気回路を形成し、両者が分離する
ときに磁気回路を遮断する。よって、固定部21、可動部
22は、内筒10の外周を1/2ずつに等分する必要はなく、
他の任意の割合に分割するものであってもよい。Further, the fixed part 21 and the movable part 22 form a magnetic circuit in the circumferential direction of the electric wire L when they are in close contact with each other, and cut off the magnetic circuit when they are separated. Therefore, the fixed part 21, the movable part
22, it is not necessary to equally divide the outer circumference of the inner cylinder 10 into 1/2,
It may be divided into any other ratio.

発明の効果 以上説明したように、この発明によれば、電線に固定
する内筒と、内筒の外周に装着する外筒とを一体に組み
立て、外筒は、温度検出部材を介して連結する固定部と
可動部とに分割することによって、可動部は、低温時に
おいて閉じ、固定部とともに電線の周方向に磁気回路を
形成し、高温時において開き、この磁気回路を遮断する
から、着雪が成長するような低温気象時においては、可
動部と固定部とによって形成される磁気回路中に送電電
流による交番磁束が集束されて外筒全体が発熱し、電線
上における着雪の分断して着雪の成長を確実に阻止する
ことができる上、着雪が発生しない高温時においては、
磁気回路が遮断されるために外筒における発熱がなく、
送電損失を最少に抑えることができるという優れた効果
がある。Effects of the Invention As described above, according to the present invention, the inner cylinder fixed to the electric wire and the outer cylinder mounted on the outer periphery of the inner cylinder are integrally assembled, and the outer cylinder is connected via the temperature detecting member. By dividing into a fixed part and a movable part, the movable part closes at low temperature, forms a magnetic circuit in the circumferential direction of the electric wire together with the fixed part, opens at high temperature, and shuts off this magnetic circuit, so that snow accumulation In a growing low-temperature weather, the alternating magnetic flux due to the transmission current is concentrated in the magnetic circuit formed by the movable part and the fixed part, and the entire outer cylinder generates heat, and the snow on the electric wires is separated and attached. In addition to reliably preventing the growth of snow, at high temperatures when snow does not occur,
There is no heat generation in the outer cylinder because the magnetic circuit is interrupted,
There is an excellent effect that transmission loss can be minimized.

また、内筒は、電線の外周に固定し、外筒は、固定部
を介して内筒の外周に装着するから、内筒は、可動部の
開閉に拘らず、電源の諸定位置に全体を安定に固定する
ことができるという効果がある。In addition, the inner cylinder is fixed to the outer circumference of the electric wire, and the outer cylinder is attached to the outer circumference of the inner cylinder via the fixed part. Can be fixed stably.

【図面の簡単な説明】[Brief description of the drawings]

第１図ないし第３図は実施例を示し、第１図は全体斜視
説明図、第２図は横断面説明図、第３図は使用状態説明
図である。 Ｌ……電線 10……内筒 20……外筒 21……固定部 22……可動部 23……バイメタル1 to 3 show an embodiment, FIG. 1 is an overall perspective explanatory view, FIG. 2 is a lateral sectional explanatory view, and FIG. 3 is a use state explanatory view. L ... electric wire 10 ... inner cylinder 20 ... outer cylinder 21 ... fixed part 22 ... movable part 23 ... bimetal

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】電線の外周に固定する内筒と、強磁性材料
からなり、前記内筒の外周に装着する外筒とを備え、該
外筒は、前記内筒に固定する固定部と、温度検出部材を
介して前記固定部に開閉自在に連結する可動部とに分割
し、前記温度検出部材は、着雪が生じ得る気温に作動温
度を設定し、低温時において前記可動部を閉じ、前記固
定部とともに電線の周方向に磁気回路を形成させる一
方、高温時において前記可動部を開き、前記磁気回路を
遮断することを特徴とする送電線用着雪防止装置。1. An inner cylinder fixed to the outer periphery of an electric wire, and an outer cylinder made of a ferromagnetic material and mounted on the outer periphery of the inner cylinder, wherein the outer cylinder is fixed to the inner cylinder; Divided into a movable portion that is openably and closably connected to the fixed portion via a temperature detection member, wherein the temperature detection member sets an operating temperature to an air temperature at which snow can occur, and closes the movable portion at a low temperature, A snow prevention device for a transmission line, wherein a magnetic circuit is formed in the circumferential direction of an electric wire together with a fixed portion, while the movable portion is opened at a high temperature to shut off the magnetic circuit. 【請求項２】前記温度検出部材は、バイメタルからなる
ことを特徴とする特許請求の範囲第１項記載の送電線用
着雪防止装置。2. The apparatus according to claim 1, wherein said temperature detecting member is made of a bimetal. 【請求項３】前記温度検出部材は、形状記憶合金からな
ることを特徴とする特許請求の範囲第１項記載の送電線
用着雪防止装置。3. The apparatus according to claim 1, wherein said temperature detecting member is made of a shape memory alloy.
JP62206848A 1987-08-20 1987-08-20 Transmission line snow accretion prevention device Expired - Lifetime JP2639531B2 (en)

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